Experimental study on the compression mechanical behaviour of steel pipes with mechanically induced pitting corrosion

The tensile behaviour of braid reinforcement is classically described by the behaviour of composite elaborated from these reinforcements. Few studies concern the tensile behaviour of braided fabrics. In this paper biaxial and triaxial braids are manufactured on a braiding loom. The evolution of key parameters as linear mass and braiding angle in function of process parameters is presented. Braid reinforcements are characterized in uniaxial tensile. The mechanical behaviour is analysed and compared in function of the braiding angle, but also different kinds of braid are considered. A specific behaviour called “double-peak” is identified for triaxial braids which have a higher braiding angle. The evolution of the braiding angle measured during tensile tests gives a comprehension on the mechanical behaviour of dry braids. Associated with this experimental study, an analytical model is also proposed, to predict mechanical properties of braid reinforcements.

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EXPERIMENTAL STUDY OF MECHANICAL BEHAVIOUR OF ANGLES IN TRANSMISSION TOWERS UNDER FREEZING TEMPERATURE

10.18057/ijasc.2018.14.3.9 ◽

2018 ◽

Keyword(s):

Experimental Study ◽

Mechanical Behaviour ◽

Freezing Temperature ◽

Transmission Towers

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An Experimental Study on the Lateral Impact of Fully Clamped Mild Steel Pipes

Proceedings of the Institution of Mechanical Engineers Part E Journal of Process Mechanical Engineering ◽

10.1243/pime_proc_1992_206_207_02 ◽

1992 ◽

Vol 206 (2) ◽

pp. 111-127 ◽

Cited By ~ 50

Author(s):

N Jones ◽

S E Birch ◽

R S Birch ◽

L Zhu ◽

M Brown

Keyword(s):

Experimental Data ◽

Experimental Study ◽

Mild Steel ◽

Failure Modes ◽

Experimental Results ◽

Lateral Impact ◽

Drop Hammer ◽

Steel Pipes ◽

Scale Range ◽

The Impact

This report presents some experimental data that were recorded from 130 impact tests on mild steel pipes in two drop hammer rigs. The pipes were fully clamped across a span which was ten times the corresponding outside pipe diameters which lie between 22 and 324 mm. All of the pipes except five had wall thicknesses of 2 mm approximately and were impacted laterally by a rigid wedge indenter at the mid span, one-quarter span or near to a support. The impact velocities ranged up to 14 m/s and caused various failure modes. Some comparisons between two sets of experimental results indicate that the laws of geometrically similar scaling are almost satisfied over a scale range of approximately five.

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EXPERIMENTAL STUDY ON USE OF FALL PREVENTION MEMBERS IN WALL AND COLUMN DEMOLITION

Proceedings of International Structural Engineering and Construction ◽

10.14455/isec.2021.8(1).con-05 ◽

2021 ◽

Vol 8 (1) ◽

Author(s):

Seiji Takanashi ◽

Hiroki Takahashi ◽

Tomohito Hori

Keyword(s):

Experimental Study ◽

Fall Prevention ◽

Urban Areas ◽

Steel Pipe ◽

Small Scale ◽

Bottom Part ◽

Steel Pipes ◽

Wire Ropes ◽

Heavy Machinery ◽

Measured Load

At demolition sites in Japan, columns and walls are pulled down and demolished by heavy machinery or wire ropes. In a small-scale building in urban areas, columns and walls are pulled down by wire ropes. Before pulling down, workers damage the bottom part of the columns and walls for weakening them. However, if the damage of the columns and walls are too much, they fall down before use of wire ropes. As a result, they may crush workers. In this study, a fall prevention material was proposed with its installation method and verified its effectiveness by experiments. In an experiment of this study, steel pipes for supporting 3m-column were examined. The steel pipes were installed diagonally to the column. The column was loaded horizontally. We measured load and deformation until the steel pipe failed. As a result of experiments, it was found that the steel pipe buckled or the bolt supporting the steel pipe damaged. We concluded that this method is effective because the steel pipes were found to be sufficiently strong against the load generated in the steel pipes when the columns fell.

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